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Long-term endurance training does not prevent the age-related decrease in left ventricular relaxation properties.

S Nottin1, L-D Nguyen, M Terbah

  • 1Laboratory of Cardio-Vascular Adaptations to Exercise, Faculty of Sciences, 33 Rue Louis Pasteur, Avignon, France.

Acta Physiologica Scandinavica
|June 8, 2004
PubMed
Summary
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Long-term endurance training does not improve age-related decline in left ventricular (LV) relaxation in older adults. Master athletes showed similar LV relaxation to sedentary individuals, suggesting other factors influence diastolic filling.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Gerontology

Background:

  • Diastolic filling dynamics in endurance-trained elderly individuals are preload-dependent.
  • Previous studies utilized transmitral flow velocity to assess diastolic function.

Purpose of the Study:

  • To evaluate the impact of long-term endurance training on left ventricular (LV) relaxation in older adults.
  • To utilize pulsed tissue Doppler imaging for assessing LV relaxation.

Main Methods:

  • Comparison of master athletes (n=14), age-matched sedentary controls (n=14), and young adults (n=15).
  • Standard Doppler echocardiography and pulsed Doppler tissue imaging were performed.
  • Measurements included transmitral flow velocity and mitral annular motion.

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Main Results:

  • Master athletes exhibited higher stroke volume and lower heart rate than sedentary controls.
  • Transmitral Peak E velocity and E/A ratio were higher in master athletes but lower than in young adults.
  • Peak LV early filling phase wall motion, an index of LV relaxation, was similar between master athletes and sedentary controls, and lower than in young adults.

Conclusions:

  • Long-term endurance training does not mitigate age-related decline in LV relaxation properties.
  • Increased LV filling pressures due to expanded blood volume may explain enhanced early diastolic filling in master athletes.
  • Further research is needed to confirm the role of increased filling pressures.